Solar cell

Abstract

A solar cell includes a photoelectric conversion layer; and a front electrode on the photoelectric conversion layer, wherein the front electrode includes a plurality of first finger electrodes; a plurality of second finger electrodes; a bus electrode directly connected to at least one of the plurality of first finger electrodes; a plurality of connecting electrodes connected to the plurality of second finger electrodes, the plurality of connecting electrodes forming at least one space therebetween; and an auxiliary electrode formed at the at least one space, wherein the auxiliary electrode connects at least two connecting electrodes of the plurality of connecting electrodes.

What is claimed is: 
     
       1. A solar cell comprising:
 a photoelectric conversion layer; and 
 a front electrode on the photoelectric conversion layer, 
 wherein the front electrode comprises:
 a plurality of first finger electrodes; 
 a plurality of second finger electrodes; 
 a bus electrode directly connected to at least one of the plurality of first finger electrodes; 
 a plurality of connecting electrodes connected to the plurality of second finger electrodes, the plurality of connecting electrodes forming a space therebetween; and 
 an auxiliary electrode formed at the space or formed between at least two connecting electrodes of the plurality of connecting electrodes, 
 
 the plurality of connecting electrodes extend in a first direction, 
 the bus electrode extends in a second direction, 
 the plurality of first finger electrodes and the plurality of second finger electrodes extend in a third direction, 
 the second direction intersects the first and third directions, 
 the plurality of connecting electrodes have a width that is smaller than a width of the bus electrode, and 
 the at least two connecting electrodes are directly connected to the bus electrode. 
 
     
     
       2. The solar cell according to  claim 1 , wherein the plurality of connecting electrodes are in contact with the bus electrode. 
     
     
       3. The solar cell according to  claim 1 , wherein the auxiliary electrode is formed in the same direction as the plurality of first finger electrodes. 
     
     
       4. The solar cell according to  claim 1 , wherein the bus electrode is formed in a direction perpendicular to the plurality of first finger electrodes. 
     
     
       5. The solar cell according to  claim 1 , wherein the plurality of connecting electrodes have a width that is greater than the auxiliary electrode. 
     
     
       6. The solar cell according to  claim 1 , wherein at least one of the plurality of first finger electrodes and the plurality of second finger electrodes have a width that is smaller than a maximum width of the bus electrode. 
     
     
       7. The solar cell according to  claim 1 , wherein a width of the auxiliary electrode is the same as a width of at least one of the plurality of first finger electrodes and the plurality of second finger electrodes. 
     
     
       8. The solar cell according to  claim 1 , wherein a distance between the plurality of connecting electrodes narrows in a direction of the bus electrode. 
     
     
       9. The solar cell according to  claim 1 , wherein the plurality of connecting electrodes are spaced apart from each other. 
     
     
       10. The solar cell according to  claim 1 , wherein an edge of the photoelectric conversion layer is adjacent to the plurality of second finger electrodes than the plurality of first finger electrodes, and
 the space is adjacent to the edge of the solar cell. 
 
     
     
       11. The solar cell according to  claim 1 , wherein the auxiliary electrode and the outmost one of the plurality of second finger electrodes adjacent to an edge of the photoelectric conversion layer are collinear. 
     
     
       12. The solar cell according to  claim 1 , wherein the plurality of second finger electrodes adjacent the space are connected to the plurality of connecting electrodes. 
     
     
       13. A solar cell module comprising:
 a plurality of solar cells, each of the plurality of solar cells comprising a photoelectric conversion layer, and an electrode on the photoelectric conversion layer; 
 an interconnector to electrically connect the electrodes of the plurality of solar cells; 
 a sealing film to seal the plurality of solar cells; 
 a front substrate disposed on front surfaces of the plurality of solar cells; and 
 a rear substrate disposed on rear surfaces of the plurality of solar cells, 
 wherein the electrode comprises:
 at least one first finger electrode; 
 a plurality of second finger electrodes; 
 a bus electrode directly connected to the at least one first finger electrode; 
 a plurality of connecting electrodes connected to at least one of the plurality of second finger electrodes, the plurality of connecting electrodes forming a space therebetween; and 
 an auxiliary electrode formed at the space or between at least two connecting electrodes of the plurality of connecting electrodes, 
 
 the plurality of connecting electrodes extend in a first direction, 
 the bus electrode extends in a second direction, 
 the at least one first finger electrode and the plurality of second finger electrodes extend in a third direction, 
 the second direction intersects the first and third directions, 
 the plurality of connecting electrodes have a width that is smaller than a width of the bus electrode, and 
 the at least two connecting electrodes are directly connected to the bus electrode. 
 
     
     
       14. The solar cell according to  claim 1 , wherein the auxiliary electrode is parallel to the one of the plurality of first finger electrodes and the plurality of second finger electrodes. 
     
     
       15. The solar cell according to  claim 1 , wherein the plurality of connecting electrodes have the width that is greater than a width of the auxiliary electrode. 
     
     
       16. The solar cell module according to  claim 13 , wherein the auxiliary electrode is parallel to the one of the at least one first finger electrode and the plurality of second finger electrodes. 
     
     
       17. The solar cell module according to  claim 13 , wherein the plurality of connecting electrodes have the width that is greater than a width of the auxiliary electrode.